多孔介质内燃烧的电容层析成像可视化测量及数值分析

Electrical Capacitance Tomography Visualization and Numerical Analysis of Combustion in Porous Media

运用电容层析成像(ECT),以非侵入的方式,对多孔介质中火焰分布进行可视化测量。预迭代法进行图像重建,同时得到最快的成像速度和具有Landweber法的图像质量。ECT结果清楚显示了多孔介质中火焰的形状、尺寸和运动,成为多孔介质中燃烧可视化的一个突破。同时,利用FLUENT软件对通道型多孔介质内预混燃烧进行数值模拟。ECT成像结果与FLUENT模拟温度场分布情况进行比较,结果显示了这2个不同学科信息的良好吻合性,以及在燃烧研究中的互验性。此次研究的成果为多孔介质燃烧领域提供了新的研究方法、测量手段、以及有应用价值的数据。

Electrical capacitance tomography （ECT） was applied in non-intrusive visualization measurement of the flame distribution in porous media. The prior-iteration algorithm was used for image reconstruction, which provided the fastest speed with the same image quality as the Landweber iterative method. ECT results show clearly the shape, size and motion of flames in porous media, which is a breakthrough in the visualization of combustion process in porous media. In the same time, numerical simulation was conducted for multi-channel porous media using Fluent. Comparison between ECT results and simulation results reveals the advantage of interdisciplinary information exchange and mutual verification in the investigation of combustion in porous media. The methodology and results of this study provide novel method and valuable data for the investigation of combustion in porous media.